This museum of miniature displays provides a journey through early American history.

The last remnants of Fort Pitt also hold the distinction of being the oldest structure west of the Allegheny Mountains.

The singer, actor, and activist lived here during his final years, and now it’s a museum dedicated to his legacy.

The humble field where the first Major League Baseball game was played.

A diorama of the Civil War, fought by cats.

A retrofuturistic art installation in the Pittsburgh Airport.

Featuring the largest CinemaScope screen in Pennsylvania, this drive-in has entertained moviegoers for more than half a century.

The Cold War-era "underground Pentagon" is a sprawling subterranean hideaway for the Defense Department.

This public park was the site of the largest civilian disaster of the Civil War.

A hidden piece of Altoona's railroad history in a long-forgotten abandoned town.

Pennsylvania's highest point is spotted with boulders which were pushed to the surface by nothing but cold.

The sounds of the world's largest fully functioning pipe organ dazzle shoppers at a Philadelphia Macy's.

Long hidden under grime, the politically radical murals of a little known Yugoslavian master are finally getting their due.

The Home and murder site of the witch of Rehmeyers Hollow.

A museum dedicated to the strange and extravagant costumes and memorabilia of the mummers, a tradition older than Philadelphia itself.

This might just be the TARDIS of bookstores.

The oldest surviving botanic garden in the United States.

Mural made of 100,000 pieces of hand blown glass, and until recently, the largest glass mural in the US.

Philadelphia boasts one of the best — and most often overlooked — traditional Japanese gardens in North America.

America's most famous museum of medical oddities is home to the remains of Albert Einstein's brain.

A super-sized promotional trick that is now a D.C. landmark.

This imposing Masonic temple a mile from the White House was the first public library in Washington, D.C.

The actual model from the original "Star Trek" series is now on display at the National Air and Space Museum.

The first purpose-built art gallery in the United States is once again open as a center of craft arts.